“
These are most likely the best IEM's you will ever find for trance, let me explain, firstly it is as if they are fine-tuned and sonically crafted for Trance and similiar genres, all the vices you heard in these IEM's in other genres suddenly become virtues and they simply come alive and you are swept away.
Secondly, there is something about the sound signature in these IEM's that is trance...” --kiteki

“I bought IM50 about 1 year ago after Soundmagic E10 and immediately notice that it sounds better than the already good E10. For 62 USD this is still my most expensive BNIB IEM to date. But unfortunately it is not my best IEM since I bought JVC FXT90 about 1 month ago. Overall FXT90 sound quality is slightly better than IM50. Both IM50 and FXT90 has fairly balanced sound with IM50 has...” --AzimAkbar

“
CKS line improves the main problem of traditional audio technica products which was bass. CKS50 did not focus on the quantity but the quality of bass, it does not have the quantity for hard rock music but it was tight and powerful enough for pop-rock also it still have the sweet mids like audio technica do which makes my perfect choice for j-pop female vocal.” --Kiln

“
I've had my eye on the Audio Technica CKR series for a good while now. Reading reviews from Head-fiers earfonia and vlenbo had me as excited to hear them as I've been about any headphone. Since I've been exploring other AT products in recent months, including the excellent value IM50 and IM70, it only made sense for me to buy a pair of their higher end budget headphones and the CKR9 was...” --ZapX629

“I actually have the ES900m, which doesn't have microphone and control buttons, but the rest is the same.
For $6 it's impossible to buy a pair of earphones as good as them. I really believe that the body of the earphones are metal, even if they are not, it's made of a very durable plastic. It's nothing like the entry-level Sony or Philips earphones which are made of cheap...” --mrplt

“Color! Because I feel in the mood for it. No, not really, this is just for the comparison.
So, Red, & Green?
Red - Not For Me.
Green - Solid, & something I personally like.
Comparison is going to be the first part of this review.
IM50 vs IM02
IM50
- Comfort of tips, Thick Mids(Sometimes so thick sounding it they become congestive), Shell can be hard to fit in some...” --whitemass

“Got this earphones for the sole purpose of working out/biking. Tested out multiple sports headsets (similarly priced), from sennheiser and bose. They tend to sound better, especially than the adidas sennheiser which sound pretty bad for the money. Great bass and clear mids and highs (considering it is bass-centric).
It is not neutral by any stretch, but you have to remember they...” --BenKatz

“
CK7 earphone is a nice detailed ear piece with titanium housing which makes it very durable. For me, although i am not using it very often this works the same as it used to be the first day i bought it. They require burn in time at least 100 hours and you can definitely tell the difference in the bass section and the mids.
Comfort: i would recommend to be worn...” --FarCry

“I recently bought these as an upgrade to my Head Direct RE0's. The RE0's are outstanding value for money, and there is not many headphones that can beat it ... until I got my hands on the CK100's.
The CK100 packaging box is nice - very simple, and does the job more than adequately. What I noticed on it, which I've not seen in many other headphone boxes is that it lists the product code for...” --s0126471

“The CKS99s are, without a doubt, a consumer-oriented headphone in its sound signature. However, despite the prominently advertised bass and the definite emphasis toward that end, the very well-controlled lows rarely step out of place.
First off the design and build. Like other members of the CKS lineup, the CKS99s are a half in-ear design. The shells are larger and stick out...” --batduck8